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lavf: add audio_preload option, this allows interleaving audio earlier

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-10-26 22:17:08 +02:00
parent 54e40b9c14
commit 31f9032b78
4 changed files with 19 additions and 1 deletions
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7
libavformat/avformat.h
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@ -1078,6 +1078,13 @@ typedef struct AVFormatContext {
*/
int ts_id;
/**
* Audio preload in microseconds.
* Note, not all formats support this and unpredictable things may happen if it is used when not supported.
* - encoding: Set by user via AVOptions (NO direct access)
* - decoding: unused
*/
int audio_preload;
/*****************************************************************
* All fields below this line are not part of the public API. They

1
libavformat/options.c
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@ -116,6 +116,7 @@ static const AVOption options[]={
{"careful", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_ER_CAREFUL }, INT_MIN, INT_MAX, D, "fer"},
{"explode", "abort decoding on error recognition", 0, AV_OPT_TYPE_CONST, {.dbl = FF_ER_EXPLODE }, INT_MIN, INT_MAX, D, "fer"},
{"fpsprobesize", "number of frames used to probe fps", OFFSET(fps_probe_size), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX-1, D},
{"audio_preload", "microseconds by which audio packets should be interleaved earlier", OFFSET(audio_preload), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX-1, E},
{NULL},
};

10
libavformat/utils.c
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@ -3308,6 +3308,16 @@ static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacke
AVStream *st2= s->streams[ next->stream_index];
int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
st->time_base);
if(s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))){
int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO);
int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO);
if(ts == ts2){
ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
-( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
ts2=0;
}
comp= (ts>ts2) - (ts<ts2);
}
if (comp == 0)
return pkt->stream_index < next->stream_index;

2
libavformat/version.h
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@ -24,7 +24,7 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 53
#define LIBAVFORMAT_VERSION_MINOR 22
#define LIBAVFORMAT_VERSION_MINOR 23
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \